package com.atpy.reggie.filter;

import com.alibaba.fastjson.JSON;
import com.atpy.reggie.common.BaseContext;
import com.atpy.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import lombok.val;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter(filterName ="loginCheckFilter",urlPatterns = "/*")
@Slf4j
public class LoginCheckFilter implements Filter {
    public static final AntPathMatcher PATH_MATCHER=new AntPathMatcher();
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request=(HttpServletRequest) servletRequest;
        HttpServletResponse response=(HttpServletResponse) servletResponse;
        String requestURI=request.getRequestURI();
        log.info("拦截到请求：{}",requestURI);

        //不需要处理的路径
        final val urls = new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "common/**",
                "/user/sendMsg",
                "/user/login"
        };

        final val check = check(urls, requestURI);
        if (check){
            log.info("本次请求{}不需要处理",requestURI);
            filterChain.doFilter(request,response);
            return;
        }
        if (request.getSession().getAttribute("employee") != null){
            log.info("用户已登录，用户ID为{}",request.getSession().getAttribute("employee"));
            Long empid=(Long) request.getSession().getAttribute("employee");
            BaseContext.setCurrentId(empid);
            filterChain.doFilter(request,response);
            return;
        }
//        4-2、判断登录状态，如果已登录，则直接放行
        if(request.getSession().getAttribute("user") != null){
            log.info("用户已登录，用户id为：{}",request.getSession().getAttribute("user"));

            Long userId = (Long) request.getSession().getAttribute("user");
            BaseContext.setCurrentId(userId);

            filterChain.doFilter(request,response);
            return;
        }
        log.info("用户未登录");

        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));

        return;



    }
    public boolean check( String[] urls,String requestURL){
        for (String url : urls) {
            final val match = PATH_MATCHER.match(url, requestURL);
            if (match){
                return true;
            }

        }
        return false;

    }
}
